CDL Study Blog
Guides, tips, and career advice for CDL applicants.
How to Get Your CDL in 2026: Step-by-Step Guide
A complete walkthrough of the CDL process — from CLP application to passing your skills test and getting your commercial driver's license.
CDL General Knowledge Test: Complete Study Guide
Everything you need to know to pass the CDL General Knowledge exam — 50 questions, 80% threshold, and the key topics the test covers.
CDL Air Brakes Test: What You Need to Know
The Air Brakes knowledge test is required to drive vehicles with air brakes. Learn the key concepts, the L restriction, and how to prepare.
CDL HazMat Endorsement (H): Requirements and Study Tips
The HazMat endorsement lets you transport placarded hazardous materials. Learn what the H endorsement requires, including the TSA background check.
CDL Class A vs Class B: Which One Do You Need?
Understand the difference between CDL Class A and Class B licenses — what vehicles each covers, what tests are required, and which jobs need them.
CDL Tanker Endorsement (N): Requirements and Test Prep
Learn what the CDL Tanker (N) endorsement covers, which vehicles require it, and the key topics on the Tank Vehicles knowledge test.
CDL Passenger Endorsement (P): Bus Driver Requirements
The CDL Passenger endorsement is required to drive buses and other vehicles carrying 16+ passengers. Here's what the P endorsement test covers.
CDL Knowledge Test Day: 10 Tips to Pass on Your First Try
Practical advice for the day of your CDL written knowledge test — what to bring, what to expect, and how to avoid common mistakes that cost drivers their pass.
CDL Combination Vehicles Test: Complete Study Guide
The Combination Vehicles test is required for Class A CDL. Learn the key topics — coupling, uncoupling, air lines, anti-jackknife, and more.
How Long Does It Take to Get a CDL in 2026?
From CLP application to CDL in hand — here's a realistic timeline for how long the CDL process takes, whether you go through a school or self-study.
CDL Doubles & Triples Endorsement (T): What You Need to Know
The T endorsement lets you pull double and triple trailers. Learn the test topics, vehicle requirements, and jobs that need this endorsement.
DOT Physical: CDL Medical Requirements Explained
A DOT medical examination is required for most CDL holders. Learn what the physical tests for, how to find a certified examiner, and what can disqualify you.
7 CDL Study Mistakes That Cause People to Fail the Test
Avoid these common CDL study mistakes that cost drivers their passing score. Smart preparation beats cramming every time.
Best CDL Trucking Jobs and Salaries in 2026
A breakdown of the best CDL jobs by pay, lifestyle, and requirements — from OTR long-haul to local delivery, tanker, and owner-operator.